• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.238-241
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• 2022

North Korea launched an ICBM and declared Moratorium for the September 19 military talks. The Armed Forces must protect military security for national defense and security. The Ministry of National Defense, which received a hacking attack from North Korea, must protect its military security even more. Recently, the leakage of military data through smartphones is occurring through smartphones. Officers and non-commissioned officers can use smartphones while working. Therefore, smartphone forensics is required to check information leakage of military data from smartphones. In this study, forensic leaks of military data from the Galaxy S20 model of S company. Research integrity verification for securing smartphone forensic evidence, securing metadata, and adopting evidence. This study will contribute to the development of military security and forensic technology.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.21 no.5
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• pp.203-208
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• 2021

At the manufacturing site, workers have been operating by inputting materials into the manufacturing process and leaving input records according to the work instructions, but product LOT tracking has been not possible due to many omissions. Recently, it is being carried out as a system to automatically input materials using RFID-Tag. In particular, the initial automatic recognition rate was good at 97 percent by automatically generating input information through RACK (TAG) ID and RACK input time analysis, but the automatic recognition rate continues to decrease due to multi-material RACK, TAG loss, and new product input issues. It is expected that it will contribute to increasing speed and yield (normal product ratio) in the overall production process by improving automatic recognition rate and real-time monitoring through the establishment of artificial intelligent smart factory datasets.

• Smart Media Journal
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• v.12 no.7
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• pp.43-51
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• 2023

As online transactions increase, the image of clothing has a great influence on consumer purchasing decisions. The importance of image information for clothing materials has been emphasized, and it is important for the fashion industry to analyze clothing images and grasp the materials used. Textile materials used for clothing are difficult to identify with the naked eye, and much time and cost are consumed in sorting. This study aims to classify the materials of textiles from clothing images based on deep learning algorithms. Classifying materials can help reduce clothing production costs, increase the efficiency of the manufacturing process, and contribute to the service of recommending products of specific materials to consumers. We used machine vision-based deep learning algorithms ResNet and Vision Transformer to classify clothing images. A total of 760,949 images were collected and preprocessed to detect abnormal images. Finally, a total of 167,299 clothing images, 19 textile labels and 20 fabric labels were used. We used ResNet and Vision Transformer to classify clothing materials and compared the performance of the algorithms with the Top-k Accuracy Score metric. As a result of comparing the performance, the Vision Transformer algorithm outperforms ResNet.

• Proceedings of the Korea Contents Association Conference
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• 2012.05a
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• pp.199-200
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• 2012

본 연구는 2012년 4월 2일부터 2012년 4월 8일까지 519명의 대전 소재 4년제 대학생들을 대상으로 스마트폰의 학습 활용에 대한 실태를 설문하여 학생들이 느끼는 학습 활용도와 학습 활용상의 문제점을 도출해 보고 또한 학년별, 성별 차이를 SPSS 18 패키지를 사용하여 분석하였다. 설문 결과 스마트폰의 학습 활용성에 대한 인식은 "보통"이라는 응답이 40.6%에 달하고 "그렇다"라는 응답과 "정말 그렇다"라고 하는 긍정적 응답은 26.6% 및 5%인 반면 "그렇지않다", "정말 그렇지 않다"라는 부정적 응답은 21.9% 및 5.9%를 나타내 학문적 활용성은 의미를 찾기 어려운 결과를 나타냈다. 성별, 학년별 차이는 통계적으로 유의할 정도의 차이를 보이지 않았다. 한편 스마트폰이 학습 활용에 있어 가장 큰 문제점이 무엇인가 하는 응답에는 "주로 엔터테인먼트에만 쓰게 된다"는 응답이 47.3%로 가장 높은 응답율을 보였고 "학습할 콘텐츠가 별로 없다"는 응답이 20.48%, "화면이 작아 학습에 부적합하다"는 응답이 17.1%로 뒤를 이었다. 이 역시 학년별로는 통계적으로 유의할 정도의 차이를 보이지 않았지만 성별로는 이유의 차이가 있었다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1484-1487
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• 2011

하드웨어의 발전으로 인하여 스마트폰이 등장함으로서 휴대폰도 PC의 기능적 부분을 수행할 수 있게 되었다. PC가 우리 생활 속에 많은 영향을 끼치는 만큼 스마트폰의 사용자 또한 급격하게 증가하는 추세이며 그에 따른 어플리케이션의 개발도 상당한 속도로 발전하고 있다. 본 논문에서는 기존에 웹 2.0 기반으로 설계된 무형문화 디지털 아카이브즈를 스마트폰 어플리케이션으로 구현함으로서 사람들의 접근성을 높이고 루씬 검색 시스템을 적용하여 기존 검색 시스템보다 효율적인 검색을 통해 사용자에게 정확한 정보를 전달할 수 있도록 하였다.

• Clean Technology
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• v.24 no.2
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• pp.112-118
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• 2018

Thermo-responsive polymers that exhibit phase transition in response to temperature change can be used as materials for smart windows because they can control solar light transmission depending on the outside temperature. The development of thermo-responsive polymers for smart windows that can be used over a wide temperature range is desirable. To obtain high performance smart windows materials, three-dimensional thermo-responsive poly(N-isopropylacrylamide) (PNIPAm) gels were prepared by free radical polymerization from monomer N-isopropylacrylamide, N, N'-methylenebis acrylamide (MBAm) as a crosslinking agent, ammonium persulfate (APS) as a strong oxidizing agent/tetramethylene diamine as a catalyst, and a mixture of two solvents (water/glycerol). This study examined the effect of glycerol content on the lower critical solution temperature (LCST), freezing temperature and the solar light transmittance of crosslinked PNIPAm gel films. The LCST and freezing temperature of PNIPAm gel films were found to be significantly decreased from 34.3 and $6.3^{\circ}C$ to 28.2 and $-6.5^{\circ}C$ with increasing glycerol content from 0 wt% to 10 wt%, respectively. It was found that the transparent PNIPAm gel films at $25^{\circ}C$ (temperature < LCST) were converted to translucent gels at higher temperature ($45^{\circ}C$) (temperature > LCST). These results suggested that the crosslinked PNIPAm gel materials prepared in this study could have high potential for application in smart glass materials.

• Polymer Science and Technology
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• v.21 no.5
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• pp.447-458
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• 2010

• Journal of Digital Convergence
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• v.10 no.3
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• pp.1-12
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• 2012

According to recent trends of ubiquitous learning with the advent of smart devices, this study was to suggest for the successful achievement of "Smart Campus" initiatives by experiencing an instruction with smart-pads (tablet PCs) in a university. A pilot project was conducted as a part of building a Smart Campus in S university in Gyeong-gi Province in Korea for the study. The class was held in the Summer semester in 2011 with six participants. Using research methodologies such as semi-structured interviews and stimulated recall, perceived academic performances, satisfaction, and the usability of smart-pads were analysed. Main results included high perceived academic performances, satisfaction, and the usability, however, some negative responses also detected on the variables. Based on the results, it was suggested that specific instructional strategies should be developed in terms of hardware, software and humanware.

• Journal of The Korean Association of Information Education
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• v.17 no.3
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• pp.367-373
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• 2013

This study elementary status of the investigation and analysis of smart phone use, and utilize of smart phones educational ways was carried out in order to investigate. In this study, factors commonly associated with the use of smart phones, in school area, gender, grade, and the need for a smart phone, smart phone using, whether for general cell phone use was a total of six tablets. General knowledge, attitude, practice about the factors and smart phone levels were analyzed using a smart phone and do not use the group's collective knowledge, attitudes, and practice levels were analyzed. To take advantage of the smart phone utilizing educational strategies were suggested, the general situation for smart phones and questionnaires were analyzed by a positive phenomenon. But Educational effect was neutral or negative views. We suggest the analysis of the educational utilization of smartphones on elementary students.

• Textile Coloration and Finishing
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• v.33 no.1
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• pp.10-23
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• 2021

In order to synthesize the dye suitable for supercritical carbon dioxide(ScCO2) dyeing, a series of azo based disperse dyes were prepared using various aniline derivatives as diazo components and indol derivatives as coupling components. Dyeing process in ScCO2 of the synthesized dyes was performed on PET fiber at 120℃ for 2 hrs under 250bar pressure with 0.5% o.w.f. of dye concentration. The absorption maxima varied from 400 to 580nm depending on the substituted groups in aniline derivatives and the indol derivatives. The dyes showed high molar extinction coefficients(ε) of 27,000~61,000M-1cm-1. Dyed PET fiber exhibited excellent brightness and good light, washing and perspiration(acid/alkali) fastness properties.